﻿<p>A controller is a device that monitors inputs and controls outputs within a building automation system.</p>
              <p>A controller may be physical (having placement within a spatial structure) or logical (a software interface or aggregated within a programmable physical controller).</p> 
 
<blockquote class="history">HISTORY&nbsp; New entity in IFC4</blockquote><blockquote class="note"></blockquote>



